Relief valve



C. G. CRISPIN RELIEF VALVE July 26, 1932.

Filed May-2, 1930 Patented July 26, 19392 airs CLARENCE GEARHART CRISPIN,

OF BERWIGK, PENNSYLVANIA RELIEF VALVE Application filed May 2, 1930. Serial No. 449,136.

, This invention relates to improvements in relief valves for purging pipe lines of air or gas. Such valves areusually float actuated and each valve arran ed to open to 5 release collected air or gas and after this gas 10 titles of collected has been purged out, the valve closes under the power of the float and is thereafter expected to afl'ord a liquid tight seal until the valve again opens to purge out further quanair or gas.

In the past ditflculty has been experienced in providing a valve which affords a liquid tight seal after closure, particularly when fluids such as gasoline, benzol and the like 5 are being handled. With such fluids, composition valve seats such as rubber or fiber seats cannot be employed because these ma terials are aflected by the fluids. Accordingly, metallic valve parts and seats must be used and where metallic valve parts are used,

difficulty is experienced in properly fitting the parts so that a tight seal may be secured under the power of the float when the valve closes.

Accordingly, one object of the present in vention resides in the provision of an improved valve construction which will tightly close and eifect-ually prevent the escape of liquid even if the liquid be gasoline, benzol 30 or the like.

with a A further object of the present invention resides in the provision of an improved valve construction which is of such nature that me tallic valve seats may be used cooperating metallic valve member and in which the parts will properly align for closing and sealing, notwithstanding the fact that nonyielding metallic valve parts are employed.

A further object of the present invention resides in the provision of a valve construction in which the valve may tilt relatively to the valve carrying and float actuated lever so that it may properly align itself with a cooperating valve seat and preferably the construction is such that such tilting for align ment is brought about by the camming action of the valve against its seat.

A further object of the present invention resides in the provision of improved details of construction of valves of this nature to the general end that a valve may be readily adjusted for proper action.

Further and other objects of the present invention will be hereinafter set forth in the accompanying specification and claims and shown in the drawing, which by way of illustration show what I now consider to be a preferred embodiment of the invention.

In the drawing:

, Figure 1 shows a general assembly View of the valve and its operating parts;

Fig. 2 is a detail cross-sectional view of the valve;

I Fig. 3 is a bottom view taken substantially on line 3-3 of Fig. 2; and

I Fig. 4 is a detail view taken on line 4-4 of Fig. 2.

In more detail in the drawing, conventionally represents a purge tank which connects to suitable pipe lines designated 1112. 13 is the valve body suitably secured to the top of the tank 10. As shown, valve body 13 is exteriorly threaded to engage threads in thetank and a suitable gasket 13?) may be provided intermediate the body and tank. Obviously, the valve body may be secured in any other desired way to the tank. 14 is a float carried by a suitably pivoted lever 15 and connected by means of a link with a valve carrying and operating lever 16. The lever 16 is fulcrumed upon a stud 17 carried by a bracket member 18 which is suitably secured to the valve body member 13. Such securing may be effected by a stud portion 19 which is threaded at its upper end to receive a nut 26. A liquid tight seal isprovided by a gasket 21.

The valve body 13 is bored out to receive a metallic valve seat disc 22 and such disc may be conveniently clamped in the valve body by a plug member 23 which is threaded to engage the valve body and tapped to receive a gas vent pipe (not shown).

The valve element comprises a semi spherical head portion 24, a shank portion 25 and a smaller shank portion 26. Intermediate portions 25 and 26 is a shoulder 30 (see Fig. 4). The valve lever 16 is provided with a threaded bored out portion 27 which is somewhat larger in diameter than the shank portion 25. Within thebored out portion 27 is a collar 28 which is exteriorly threaded to screw into the threads of lever 16. The collar 28 is also bored out with a hole through which the shank portion 26 passes with considerable clearance. .The

valve member is impositively held with the shouldered portion 30lagainst themppenedge of the collar 28 by means of a spring 31 which at its upper end abuts the lower edge of'the collar and which i'SiSElflHHd-iatl-itSlUWHI end a by a cotter pin 33 which'p'asses through the shank 26.

It will be understood 'tion of the valve lever 16. may. be varied by, adj Listing the posithatthe initial position of thecollar 28. with respect to the lever 16.. To provide. for'suchadjnstment, one'end of he collar is provided with: a transverse slot 3%; to receive a. screw driver After a proper. adjustment of the collar issecured, it may be locked in suchpositionzby a: set screw 35 1 V i head 24" with respectto the for affording a liquid tight seal when closed,

including a valve seat member, a valve lever and a valve member carried by said lever and cooperating with said seat, said valve member having a spherical head which cooperates with the seat and said valve member being loosely mounted in the lever, and. having a spring disposedto normally. maintain a determined upstanding relation of the valve member with respect to the lever, said valve as to tip slightly in any direction with respent thereto upon the camming engagement of the valve head with the valve seat and causing said spring-to be slightly compressed uponsaidtippingi. Intestimony. whereof. I. hereto affix. my signature.

,LARENCE GEABHJXBT CBISPIN.

The foregoing adjustment provides for I setting the valve parts initially solthat'the valve member will approximately properly cooperate withthe-metall ic valvediscor. seat. In operation subsequently, the clearance aroundthe.shankflfi between it and thecolilar V I and the clearance betweenthee shank 25-and the bored outportion 27 andlthe spifing'construction,'provicle for suflicientfreedom for thevalveeto permitiit-totilt slightly to propvalve member and mounting itzso thatfit can relatively yield and tilt with. respect. to the lever 16,, the power. of the flieat issuflieient to provide a liquid tightsealt Furthermore, fullymetalli'c rion-yielding: parts cam be utilized for both seat and valve and a tight sealawillibe secured, notwithstanding fact that the seat is not-made ofiyielding mateniaL What I claim is: 1 A neliet valve tor pipelines to purge the latter ct air and; gas and afford; ailliquid tight; seal; when closed, saidivallvecomprising a valve seat, a; valve eanryingleven, acollar member. whichis relatively'adjustable in the lever, portion toengage a valve member having a.- shouldered clearance through the eellan member, and aspi ing: abutting: the eollazr'memhen and; dis.- pzosed around the reduced portionifo-r the purpose described.

- 2. A nelietvalve for purging punposesa-nd theeellar. member and a reduced shank portion adaptedtoi pass with member being? also-so;- mounted z. on the lever 

